What do I have to do because I don't understand at all what's happening

# Hey i dont under stand funtion imports

**kyva**#3

I think he might have an issue with the import of the square portion of math. I'm having trouble getting it to work myself

**mtf**#4

The `sqrt`

function is imported from `math`

, as follows:

`from math import sqrt`

Now in our code we will write,

`y = sqrt(x)`

where `x`

is the parameter of the function, and `y`

is the return value.

```
def sigma(sigma_squared):
return sqrt(sigma_squared)
```

**azere**#5

thank but I figured it out but I need help with this list and slicing

suitcase = ["sunglasses", "hat", "passport", "laptop", "suit", "shoes"]

first = suitcase[0:2] # The first and second items (index zero and one)

middle = suitcase[2:4] # Third and fourth items (index two and three)

last = suitcase[5:6] # The last two items (index four and five)

**mtf**#6

Not sure how this relates to the opening topic. We could still use a link to the lesson, please.

Your slices look correct. Is there an error message?

`last = suitcase[4:]`

**system**#9

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